循环载荷作用下TRIP双相不锈钢的马氏体相变及其微观机制

Martensitic Transformation and Its Microscopic Mechanism of TRIP Duplex Stainless Steel Under Cyclic Loading.

作者信息

Wang Yixiao, Liu Yi, Wang Hongzhong, Zou Zongyuan, Chen Lei

机构信息

Hubei Modern Manufacturing Quality Engineering Key Laboratory, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China.

School of Mechanical Engineering, Wuhan Vocational College of Software and Engineering, Wuhan 430205, China.

出版信息

Materials (Basel). 2025 May 8;18(10):2169. doi: 10.3390/ma18102169.

DOI:10.3390/ma18102169

PMID:40428907

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12113027/

Abstract

TRIP duplex stainless steels, characterized by high strength and high plasticity, can achieve light-weighting and contribute to reducing fuel consumption and emissions. To further promote the development and application of lightweight metastable duplex stainless steels, the martensitic transformation and the microscopic mechanism of Mn-N alloyed TRIP duplex stainless steel under cyclic loading were investigated. An in situ measurement platform for martensitic transformation under cyclic loading was constructed using an INSTRON 8801 series servo-hydraulic testing machine (Shanghai Instron Test Equipment Trading Co., Ltd., Shanghai, China) and an FMP30 ferrite measuring instrument (Nantong Fischer Testing Instrument Co., Ltd., Nantong, China). The volume fraction of martensitic transformation under symmetrical cyclic loading for different cycles, with strain amplitudes of 0.5%, 0.7%, 0.9%, 1.1%, and 1.3%, was measured. The transformation law of martensite under cyclic loading was analyzed, and a kinetics model for martensitic transformation under cyclic loading was established. Furthermore, the martensitic transformation law, the influence of austenite grain orientation on martensitic transformation, and the microscopic mechanism of martensitic transformation under cyclic loading were analyzed by means of electron back-scattering diffraction (EBSD) and transmission electron microscopy (TEM).

摘要

相变诱发塑性（TRIP）双相不锈钢具有高强度和高塑性的特点，能够实现轻量化，有助于降低燃油消耗和排放。为了进一步推动轻质亚稳双相不锈钢的发展与应用，研究了Mn-N合金化TRIP双相不锈钢在循环载荷作用下的马氏体相变及微观机制。利用INSTRON 8801系列伺服液压试验机（中国上海英斯特朗试验设备贸易有限公司）和FMP30铁素体测量仪（中国南通菲舍尔测试仪器有限公司）搭建了循环载荷作用下马氏体相变的原位测量平台。测量了在对称循环载荷作用下，应变量幅值分别为0.5%、0.7%、0.9%、1.1%和1.3%时，不同循环次数下的马氏体相变体积分数。分析了循环载荷作用下马氏体的转变规律，建立了循环载荷作用下马氏体相变的动力学模型。此外，通过电子背散射衍射（EBSD）和透射电子显微镜（TEM）分析了循环载荷作用下马氏体的转变规律、奥氏体晶粒取向对马氏体转变的影响以及马氏体转变的微观机制。